:root{--formula-accent:#6847f5;--formula-accent-2:#8f6cf7;--formula-soft:#f7f3ff;--formula-soft-2:#efe7ff;--formula-line:#e8e1f5;--formula-ink:#282338;--formula-muted:#7c7588;--formula-card:#fff;--formula-shadow:0 14px 38px rgba(66,43,117,.08)}
.formula-head{position:relative;overflow:hidden;display:flex;justify-content:space-between;gap:22px;align-items:flex-start;margin-bottom:14px;padding:22px 24px;border:1px solid #e7def8;border-radius:24px;background:radial-gradient(circle at 92% 8%,rgba(142,108,247,.18),transparent 31%),radial-gradient(circle at 8% 92%,rgba(104,71,245,.08),transparent 28%),linear-gradient(145deg,#fff 0%,#fbf9ff 55%,#f4efff 100%);box-shadow:0 18px 46px rgba(59,38,105,.08)}.formula-head:after{content:'ƒ';position:absolute;right:34px;bottom:-36px;font-family:Georgia,serif;font-size:150px;font-style:italic;color:rgba(104,71,245,.055);pointer-events:none}.formula-head>div:first-child{position:relative;z-index:1}.formula-head .badge{background:linear-gradient(135deg,#efe8ff,#f7f3ff);border:1px solid #ddd1fb;color:#6546bb;font-size:9px;font-weight:900;letter-spacing:.08em;text-transform:uppercase}.formula-head h2{margin:7px 0 6px;font-size:30px;line-height:1.05;letter-spacing:-.045em;color:var(--formula-ink)}.formula-head p{margin:0;max-width:650px;color:var(--formula-muted);font-size:12px;line-height:1.6}.formula-actions{position:relative;z-index:2;display:flex;gap:8px;flex-wrap:wrap}.formula-actions button{min-height:40px;border-radius:12px;padding:0 14px;font-weight:800}.formula-actions .primary{box-shadow:0 9px 22px rgba(104,71,245,.19)}
.formula-tools{display:grid;grid-template-columns:minmax(0,1fr) 205px;gap:9px;margin-bottom:9px;padding:10px 11px;border:1px solid #ece6f5;border-radius:16px;background:#fff;box-shadow:0 6px 22px rgba(57,38,93,.028)}.formula-tools+.formula-tools{margin-top:-4px;grid-template-columns:205px minmax(0,1fr)}.formula-tools input,.formula-tools select,.formula-editor input,.formula-editor textarea,.formula-editor select,.formula-import input,.formula-import textarea,.formula-import select{width:100%;box-sizing:border-box;border:1px solid #e3ddec;border-radius:11px;padding:10px 12px;background:#fff;color:var(--formula-ink);font:inherit;font-size:12px;transition:border-color .15s,box-shadow .15s,background .15s}.formula-tools input,.formula-tools select{height:40px}.formula-tools input{background:linear-gradient(180deg,#fff,#fdfcff)}.formula-tools input:focus,.formula-tools select:focus,.formula-editor input:focus,.formula-editor textarea:focus,.formula-editor select:focus,.formula-import input:focus,.formula-import textarea:focus,.formula-import select:focus{outline:none;border-color:#b7a5ef;box-shadow:0 0 0 4px rgba(104,71,245,.08)}
.formula-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(290px,1fr));gap:12px}.formula-card,.formula-detail-card,.formula-import-item,.formula-student-card{background:var(--formula-card);border:1px solid #e9e3f0;border-radius:20px;box-shadow:0 8px 26px rgba(45,33,76,.045)}.formula-card{position:relative;overflow:hidden;padding:16px 16px 15px;transition:transform .18s ease,border-color .18s ease,box-shadow .18s ease}.formula-card:before{content:'';position:absolute;inset:0 0 auto;height:3px;background:linear-gradient(90deg,#6847f5,#9a78f8,#d7c6ff)}.formula-card:after{content:'';position:absolute;width:130px;height:130px;right:-82px;top:-78px;border-radius:50%;background:rgba(104,71,245,.045);pointer-events:none}.formula-card:hover{transform:translateY(-3px);border-color:#d8cdf2;box-shadow:0 17px 38px rgba(62,42,125,.105)}.formula-card-top,.formula-student-head{display:flex;justify-content:space-between;gap:12px;align-items:flex-start}.formula-card-top>div{min-width:0}.formula-card .badge{background:#f2edff;border:1px solid #e2d7fb;color:#6847bf;font-size:9px;font-weight:850;padding:4px 7px}.formula-card h3,.formula-detail-card h2{margin:8px 0 3px;color:var(--formula-ink)}.formula-card h3{font-size:16px;line-height:1.25;letter-spacing:-.018em}.formula-card p,.formula-detail-card p{color:var(--formula-muted);line-height:1.5}.formula-card>p{margin:8px 0 10px;font-size:10.5px}.formula-edit{min-height:31px;padding:0 9px!important;border-radius:9px!important;font-size:9px!important;opacity:.76}.formula-card:hover .formula-edit{opacity:1}
.formula-math{position:relative;overflow:auto;padding:20px 14px;margin:13px 0 11px;border-radius:16px;background:radial-gradient(circle at 15% 10%,rgba(255,255,255,.95),transparent 34%),linear-gradient(145deg,#faf8ff,#f1ebff);border:1px solid #e3d9fa;text-align:center;font-family:"Times New Roman",serif;font-size:24px;white-space:pre-wrap;min-height:44px;display:grid;place-items:center;color:#2f2740;box-shadow:inset 0 1px 0 rgba(255,255,255,.9)}.formula-math:before{content:'';position:absolute;inset:0;pointer-events:none;background:linear-gradient(90deg,transparent,rgba(104,71,245,.025),transparent)}.formula-math .katex{font-size:1.08em}.formula-math .katex-display{margin:.15em 0}.stage6-meta{display:flex!important;gap:5px!important;flex-wrap:wrap!important;margin-top:6px!important}.stage6-meta span{display:inline-flex!important;align-items:center!important;min-height:24px!important;padding:0 7px!important;border:1px solid #ece6f4!important;border-radius:999px!important;background:#fbf9fd!important;color:#81788d!important;font-size:8.5px!important;font-weight:700!important}
.formula-editor,.formula-import{display:grid;gap:11px;max-width:980px;padding:18px;border:1px solid #eae4f2;border-radius:21px;background:linear-gradient(145deg,#fff,#fcfbff);box-shadow:0 10px 30px rgba(56,39,93,.045)}.formula-editor>h2,.formula-import>h2{margin:1px 0 2px;font-size:23px;letter-spacing:-.03em;color:var(--formula-ink)}.formula-editor>p,.formula-import>p{margin:0;color:var(--formula-muted);font-size:11px;line-height:1.55}.formula-editor label,.formula-import label{display:grid;gap:5px;font-size:10px;font-weight:800;color:#6e6678}.formula-editor textarea,.formula-import textarea{min-height:88px;resize:vertical;line-height:1.5}.formula-editor #fLatex{min-height:96px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;background:#fbf9ff}.formula-editor #formulaPreview{margin:0}.formula-editor #formulaPreview .formula-math{margin:2px 0 4px;min-height:74px;font-size:27px;border-color:#dcd0f8;background:linear-gradient(145deg,#fff,#f5efff)}.form-row{display:grid;grid-template-columns:1fr 1fr;gap:10px}.formula-editor .primary.wide,.formula-import .primary.wide{min-height:42px;border-radius:11px;font-weight:850;box-shadow:0 8px 20px rgba(104,71,245,.16)}
.formula-detail-card{padding:20px;max-width:980px}.formula-detail-card>h2{font-size:28px;letter-spacing:-.03em}.formula-detail-sections{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin-top:14px}.formula-detail-sections section{padding:13px;border-radius:14px;background:#fbfafc;border:1px solid #ece9f2}.formula-detail-sections h4{margin:0 0 7px;font-size:10px;text-transform:uppercase;letter-spacing:.08em;color:#6b617c}.formula-detail-sections p{white-space:pre-line;margin:0;font-size:12px}.formula-fav{border:1px solid #ded6f1;background:#fff;color:#7048d8;border-radius:11px;padding:7px 9px;font-weight:800;cursor:pointer;transition:.15s}.formula-fav:hover{background:#f7f3ff}.formula-fav.active{background:#efe8ff;border-color:#cfc0ff;color:#6040cd}
.formula-import .pdf-drop{min-height:170px;border:1.5px dashed #cfc1ed;border-radius:18px;display:grid;place-content:center;text-align:center;padding:22px;background:radial-gradient(circle at 50% 0%,rgba(104,71,245,.07),transparent 48%),linear-gradient(145deg,#fff,#faf7ff);transition:.16s}.formula-import .pdf-drop:hover{border-color:#a995e4;background:linear-gradient(145deg,#fff,#f6f0ff)}.formula-import .pdf-drop input{border:0;padding:0;background:transparent;margin-bottom:9px;height:auto}.formula-import .pdf-drop b{font-size:13px;color:#443859}.formula-import .pdf-drop span{margin-top:4px;font-size:10px;color:#8b8396}.formula-import-list{display:grid;gap:9px}.formula-import-item{padding:14px}.formula-import-item .hm-check{display:flex;gap:10px;align-items:flex-start}.formula-import-item small{display:block;color:var(--formula-muted);margin-top:4px;font-size:9px}.formula-import-item .formula-math{font-size:21px;min-height:38px}.formula-import-item>p{font-size:10px;color:var(--formula-muted)}
.formula-student-head{margin-bottom:11px}.formula-student-head>div>h2{margin:4px 0 5px;font-size:27px;letter-spacing:-.035em}.formula-student-head>div>p{max-width:740px;line-height:1.5}.formula-student-controls{display:grid;grid-template-columns:minmax(0,1fr) 170px;gap:9px;margin:10px 0}.formula-student-controls input,.formula-student-controls select{width:100%;border:1px solid #e4e0eb;border-radius:12px;padding:10px 12px;background:#fff}.formula-student-card{position:relative;padding:15px;margin:10px 0;cursor:pointer;transition:.15s}.formula-student-card:hover{transform:translateY(-1px);border-color:#d7cef5;box-shadow:0 14px 30px rgba(62,42,125,.08)}.formula-student-card h3{margin:7px 0 0;font-size:17px;letter-spacing:-.02em}.formula-student-card>p{margin:5px 0 0;color:var(--formula-muted);line-height:1.5}.formula-student-card .formula-math{font-size:21px}.formula-chip-row{display:flex;gap:5px;flex-wrap:wrap;margin-top:9px}.formula-chip{font-size:9px;font-weight:750;background:#f2eef9;color:#6c50a8;border:1px solid #e6dcf6;border-radius:999px;padding:4px 7px}.formula-student-card .formula-chip:first-child{background:#efeaff;color:#6748d1}.formula-empty{padding:26px;border:1px dashed #dcd6e8;border-radius:18px;background:#fbfafd;text-align:center;color:var(--formula-muted)}
@media(max-width:900px){.formula-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.formula-detail-sections{grid-template-columns:1fr}.formula-head:after{font-size:120px}}
@media(max-width:720px){.formula-head{flex-direction:column;padding:17px;border-radius:19px}.formula-head h2,.formula-student-head>div>h2{font-size:24px}.formula-head:after{right:-4px;bottom:-32px;font-size:110px}.formula-actions{width:100%}.formula-actions button{flex:1 1 0}.formula-tools,.formula-tools+.formula-tools,.formula-student-controls{grid-template-columns:1fr;padding:9px}.formula-grid{grid-template-columns:1fr}.formula-detail-card,.formula-editor,.formula-import{padding:14px;border-radius:17px}.formula-math{font-size:21px;padding:16px 10px}.formula-editor #formulaPreview .formula-math{font-size:23px}.formula-student-head{align-items:flex-start}.formula-detail-sections section{padding:12px}.form-row{grid-template-columns:1fr}}
@media(max-width:430px){.formula-head{padding:15px}.formula-head h2{font-size:22px}.formula-actions{display:grid;grid-template-columns:1fr}.formula-card{padding:14px}.formula-card-top{gap:7px}.formula-card h3{font-size:15px}.formula-math{font-size:19px;min-height:38px}.formula-editor,.formula-import{padding:12px}.formula-editor>h2,.formula-import>h2{font-size:20px}}
.formula-tools{align-items:center}.formula-tools select{appearance:auto}.formula-empty{max-width:560px;min-height:110px;box-sizing:border-box;display:grid;place-items:center}.formula-head{padding:18px 20px;border-radius:20px}.formula-head h2{font-size:26px}